黄云飞
4 years ago
parent
75225e7180
commit
a9d6601207
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After Width: | Height: | Size: 370 B |
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After Width: | Height: | Size: 242 B |
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import { EditorComponent, EDITOR_COMPONENT } from '../../editor'
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import './signature.css'
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export interface ISignatureConfirm {
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value: string;
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width: number;
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height: number;
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}
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export interface ISignatureOptions {
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width?: number;
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height?: number;
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onClose?: () => void;
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onCancel?: () => void;
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onConfirm?: (payload: ISignatureConfirm) => void;
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}
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export class Signature {
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private x: number
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private y: number
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private isDrawing: boolean
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private canvasWidth: number
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private canvasHeight: number
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private options: ISignatureOptions
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private mask: HTMLDivElement
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private container: HTMLDivElement
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private trashContainer: HTMLDivElement
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private canvas: HTMLCanvasElement
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private ctx: CanvasRenderingContext2D
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constructor(options: ISignatureOptions) {
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this.x = 0
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this.y = 0
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this.isDrawing = false
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this.options = options
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this.canvasWidth = options.width || 390
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this.canvasHeight = options.height || 180
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const { mask, container, trashContainer, canvas } = this._render()
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this.mask = mask
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this.container = container
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this.trashContainer = trashContainer
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this.canvas = canvas
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this.ctx = <CanvasRenderingContext2D>canvas.getContext('2d')
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this._bindEvent()
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}
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private _render() {
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const { onClose, onCancel, onConfirm } = this.options
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// 渲染遮罩层
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const mask = document.createElement('div')
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mask.classList.add('signature-mask')
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mask.setAttribute(EDITOR_COMPONENT, EditorComponent.COMPONENT)
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document.body.append(mask)
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// 渲染容器
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const container = document.createElement('div')
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container.classList.add('signature-container')
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container.setAttribute(EDITOR_COMPONENT, EditorComponent.COMPONENT)
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// 弹窗
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const signatureContainer = document.createElement('div')
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signatureContainer.classList.add('signature')
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container.append(signatureContainer)
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// 标题容器
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const titleContainer = document.createElement('div')
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titleContainer.classList.add('signature-title')
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// 标题&关闭按钮
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const titleSpan = document.createElement('span')
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titleSpan.append(document.createTextNode('插入签名'))
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const titleClose = document.createElement('i')
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titleClose.onclick = () => {
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if (onClose) {
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onClose()
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}
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this._dispose()
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}
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titleContainer.append(titleSpan)
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titleContainer.append(titleClose)
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signatureContainer.append(titleContainer)
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// 操作区
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const operationContainer = document.createElement('div')
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operationContainer.classList.add('signature-operation')
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const trashContainer = document.createElement('div')
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trashContainer.classList.add('signature-operation__trash')
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const trashIcon = document.createElement('i')
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const trashLabel = document.createElement('span')
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trashLabel.innerText = '清空画布'
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trashContainer.append(trashIcon)
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trashContainer.append(trashLabel)
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operationContainer.append(trashContainer)
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signatureContainer.append(operationContainer)
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// 绘图区
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const canvasContainer = document.createElement('div')
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canvasContainer.classList.add('signature-canvas')
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const canvas = document.createElement('canvas')
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canvas.width = this.canvasWidth
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canvas.height = this.canvasHeight
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canvas.style.width = `${this.canvasWidth}px`
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canvas.style.height = `${this.canvasHeight}px`
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canvasContainer.append(canvas)
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signatureContainer.append(canvasContainer)
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// 按钮容器
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const menuContainer = document.createElement('div')
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menuContainer.classList.add('signature-menu')
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// 取消按钮
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const cancelBtn = document.createElement('button')
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cancelBtn.classList.add('signature-menu__cancel')
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cancelBtn.append(document.createTextNode('取消'))
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cancelBtn.type = 'default'
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cancelBtn.onclick = () => {
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if (onCancel) {
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onCancel()
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}
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this._dispose()
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}
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menuContainer.append(cancelBtn)
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// 确认按钮
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const confirmBtn = document.createElement('button')
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confirmBtn.append(document.createTextNode('确定'))
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confirmBtn.type = 'primary'
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confirmBtn.onclick = () => {
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if (onConfirm) {
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onConfirm({
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width: this.canvasWidth,
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height: this.canvasHeight,
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value: this._toDataURL()
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})
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}
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this._dispose()
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}
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menuContainer.append(confirmBtn)
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signatureContainer.append(menuContainer)
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// 渲染
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document.body.append(container)
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this.container = container
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this.mask = mask
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return {
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mask,
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canvas,
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container,
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trashContainer
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}
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}
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private _bindEvent() {
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this.trashContainer.onclick = this._clearCanvas.bind(this)
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this.canvas.onmousedown = this._startDraw.bind(this)
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this.canvas.onmousemove = this._draw.bind(this)
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this.container.onmouseup = this._stopDraw.bind(this)
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}
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private _clearCanvas() {
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this.ctx.clearRect(0, 0, this.canvasWidth, this.canvasHeight)
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}
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private _startDraw(evt: MouseEvent) {
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this.isDrawing = true
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this.x = evt.offsetX
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this.y = evt.offsetY
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this.ctx.lineWidth = 5
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this.ctx.lineCap = 'butt'
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this.ctx.lineJoin = 'round'
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}
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private _draw(evt: MouseEvent) {
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if (!this.isDrawing) return
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const { offsetX, offsetY } = evt
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this.ctx.beginPath()
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this.ctx.moveTo(this.x, this.y)
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this.ctx.lineTo(offsetX, offsetY)
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this.ctx.stroke()
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this.x = offsetX
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this.y = offsetY
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}
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private _stopDraw() {
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this.isDrawing = false
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}
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private _toDataURL() {
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return this.canvas.toDataURL()
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}
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private _dispose() {
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this.mask.remove()
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this.container.remove()
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}
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}
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@ -0,0 +1,122 @@
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.signature-mask {
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position: fixed;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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opacity: .5;
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background: #000000;
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z-index: 99;
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}
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.signature-container {
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position: fixed;
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top: 0;
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right: 0;
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bottom: 0;
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left: 0;
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overflow: auto;
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z-index: 999;
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margin: 0;
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display: flex;
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justify-content: center;
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align-items: center;
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}
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.signature {
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position: absolute;
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padding: 0 30px 30px;
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background: #ffffff;
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box-shadow: 0 2px 12px 0 rgb(56 56 56 / 20%);
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border: 1px solid #e2e6ed;
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border-radius: 2px;
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}
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.signature-title {
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position: relative;
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border-bottom: 1px solid #e2e6ed;
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margin-bottom: 15px;
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height: 60px;
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display: flex;
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align-items: center;
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justify-content: space-between;
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}
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.signature-title i {
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width: 16px;
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height: 16px;
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cursor: pointer;
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display: inline-block;
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background: url(../../assets/images/close.svg);
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}
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.signature-operation__trash {
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cursor: pointer;
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display: inline-flex;
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align-items: center;
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color: #3d4757;
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user-select: none;
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}
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.signature-operation__trash:hover {
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color: #6e7175;
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}
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.signature-operation__trash i {
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width: 24px;
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height: 24px;
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display: inline-block;
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background: url(../../assets/images/trash.svg) no-repeat;
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}
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.signature-operation__trash span {
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font-size: 12px;
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margin-left: 5px;
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}
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.signature-canvas {
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margin: 15px 0;
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border: 1px solid #e9e9e9;
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user-select: none;
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}
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.signature-canvas canvas {
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background: #fbfbfb;
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}
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.signature-menu {
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display: flex;
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align-items: center;
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justify-content: flex-end;
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}
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.signature-menu button {
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position: relative;
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display: inline-block;
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border: 1px solid #e2e6ed;
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border-radius: 2px;
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background: #ffffff;
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line-height: 22px;
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padding: 0 16px;
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white-space: nowrap;
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cursor: pointer;
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}
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.signature-menu button:hover {
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background: rgba(25, 55, 88, .04);
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}
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.signature-menu__cancel {
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margin-right: 16px;
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}
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.signature-menu button[type='primary'] {
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color: #ffffff;
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background: #4991f2;
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border-color: #4991f2;
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}
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.signature-menu button[type='primary']:hover {
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background: #5b9cf3;
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border-color: #5b9cf3;
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}
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